Error(s) in re-building vignettes:
  ...
--- re-building ‘galah.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘galah.Rmd’

--- re-building ‘international_atlases.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘international_atlases.Rmd’

--- re-building ‘taxonomic_information.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Quitting from lines 63-73 (taxonomic_information.Rmd) 
Error: processing vignette 'taxonomic_information.Rmd' failed with diagnostics:
there is no package called 'webshot'
--- failed re-building ‘taxonomic_information.Rmd’

SUMMARY: processing the following file failed:
  ‘taxonomic_information.Rmd’

Error: Vignette re-building failed.
Execution halted